Actually, there have been two other Tree-sans that I know of - Winter, and one of my friends' friend Lan. You can kind of see both of them here (http://www.tokyo-tower.org/shoujocon/Picture_1159.jpg), Winter being the one without the branches. She's currently working on making a new Tree-san outfit, though, as that one was made the night before the con and she's not happy with how it came out.